跨越既有铁路门式墩钢盖梁转体施工技术

Rotation Construction Technology of Steel Cap Beam of Portal Pier Crossing Existing Railway

为解决新建铁路采用小夹角跨越既有铁路时,如何避免对既有铁路正常运营造成施工干扰的问题,针对门式墩钢盖梁跨线施工方案,首次提出一种改进的转体装置及施工方法。在实际工程中,通过有限元模拟验证了该转体装置和门式墩钢盖梁的结构可靠性。应用结果表明,改进的转体装置安装简单、缩短工期、质量可靠;该方法实现了采用大跨度门式墩钢盖梁以小夹角跨越既有铁路线的合理施工,具有施工周期短、造价低、安全性高的优点。

When the new railway crosses the existing railway with a small angle, it is necessary to ensure the normal operation of the existing railway without construction interference. In the context, an improved rotation device and its corresponding construction method are put forward for the first time based on the scheme of using the portal pier with a steel capping beam. In an actual engineering, the feasibility of the rotation device and the portal pier structure is verified. Consequently, the actual application shows that the improved rotation device has the advantages of simple installation, time saving and reliable quality. Furthermore, it is found that this proposed construction method achieves the reasonable construction of the steel capping beam of the long span portal pier crossing existing railway line with a small angle, and has the advantages of short construction period, low cost, high safety.